./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:59:55,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:59:55,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:59:55,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:59:55,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:59:55,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:59:55,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:59:55,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:59:55,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:59:55,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:59:55,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:59:55,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:59:55,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:59:55,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:59:55,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:59:55,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:59:55,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:59:55,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:59:55,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:59:55,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:59:55,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:59:55,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:59:55,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:59:55,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:59:55,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:59:55,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:59:55,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:59:55,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:59:55,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:59:55,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:59:55,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:59:55,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:59:55,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:59:55,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:59:55,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:59:55,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:59:55,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:59:55,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:59:55,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:59:55,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:59:55,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:59:55,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:59:55,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:59:55,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:59:55,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:59:55,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:59:55,496 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:59:55,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:59:55,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:59:55,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:59:55,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:59:55,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:59:55,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:59:55,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:59:55,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:59:55,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:59:55,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:59:55,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:59:55,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:59:55,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:59:55,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:59:55,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:59:55,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:59:55,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:59:55,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:59:55,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:59:55,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:59:55,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:59:55,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:59:55,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:59:55,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:59:55,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-11-29 20:59:55,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:59:55,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:59:55,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:59:55,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:59:55,780 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:59:55,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test25-1.c [2020-11-29 20:59:55,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/34cf95029/ceb7b06516934d67bad30bf994ce2401/FLAG8e9033f63 [2020-11-29 20:59:56,414 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:59:56,414 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/sv-benchmarks/c/ldv-regression/test25-1.c [2020-11-29 20:59:56,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/34cf95029/ceb7b06516934d67bad30bf994ce2401/FLAG8e9033f63 [2020-11-29 20:59:56,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/34cf95029/ceb7b06516934d67bad30bf994ce2401 [2020-11-29 20:59:56,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:59:56,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:59:56,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:59:56,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:59:56,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:59:56,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:59:56" (1/1) ... [2020-11-29 20:59:56,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b4206a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:56, skipping insertion in model container [2020-11-29 20:59:56,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:59:56" (1/1) ... [2020-11-29 20:59:56,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:59:56,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:59:57,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:59:57,055 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:59:57,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:59:57,110 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:59:57,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57 WrapperNode [2020-11-29 20:59:57,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:59:57,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:59:57,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:59:57,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:59:57,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:59:57,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:59:57,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:59:57,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:59:57,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... [2020-11-29 20:59:57,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:59:57,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:59:57,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:59:57,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:59:57,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:59:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 20:59:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:59:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 20:59:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:59:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:59:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:59:57,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:59:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:59:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:59:57,760 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:59:57,760 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 20:59:57,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:59:57 BoogieIcfgContainer [2020-11-29 20:59:57,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:59:57,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:59:57,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:59:57,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:59:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:59:56" (1/3) ... [2020-11-29 20:59:57,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1139696b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:59:57, skipping insertion in model container [2020-11-29 20:59:57,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:59:57" (2/3) ... [2020-11-29 20:59:57,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1139696b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:59:57, skipping insertion in model container [2020-11-29 20:59:57,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:59:57" (3/3) ... [2020-11-29 20:59:57,774 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-11-29 20:59:57,785 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:59:57,790 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:59:57,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:59:57,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:59:57,840 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:59:57,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:59:57,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:59:57,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:59:57,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:59:57,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:59:57,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:59:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-29 20:59:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:59:57,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:57,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:59:57,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:59:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:59:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-11-29 20:59:57,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:59:57,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065476418] [2020-11-29 20:59:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:59:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:59:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065476418] [2020-11-29 20:59:58,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:59:58,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:59:58,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425796906] [2020-11-29 20:59:58,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:59:58,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:59:58,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:59:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:59:58,054 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-11-29 20:59:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:59:58,084 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-11-29 20:59:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:59:58,086 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 20:59:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:59:58,094 INFO L225 Difference]: With dead ends: 31 [2020-11-29 20:59:58,094 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 20:59:58,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:59:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 20:59:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 20:59:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 20:59:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 20:59:58,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-29 20:59:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:59:58,128 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 20:59:58,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:59:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-29 20:59:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:59:58,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:58,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:59:58,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:59:58,130 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:59:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:59:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-11-29 20:59:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:59:58,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340064476] [2020-11-29 20:59:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:59:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:59:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340064476] [2020-11-29 20:59:58,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:59:58,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:59:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329729744] [2020-11-29 20:59:58,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:59:58,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:59:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:59:58,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:59:58,200 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-11-29 20:59:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:59:58,237 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-29 20:59:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:59:58,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 20:59:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:59:58,240 INFO L225 Difference]: With dead ends: 24 [2020-11-29 20:59:58,240 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 20:59:58,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:59:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 20:59:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-29 20:59:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 20:59:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-29 20:59:58,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-29 20:59:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:59:58,247 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-29 20:59:58,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:59:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-29 20:59:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:59:58,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:58,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:59:58,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:59:58,250 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:59:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:59:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-11-29 20:59:58,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:59:58,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70017367] [2020-11-29 20:59:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:59:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:59:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70017367] [2020-11-29 20:59:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117740566] [2020-11-29 20:59:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:59:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:59:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:59:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:59:58,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:59:58,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 20:59:58,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014322452] [2020-11-29 20:59:58,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:59:58,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:59:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:59:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:59:58,530 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-11-29 20:59:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:59:58,581 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-29 20:59:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:59:58,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 20:59:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:59:58,584 INFO L225 Difference]: With dead ends: 26 [2020-11-29 20:59:58,584 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 20:59:58,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:59:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 20:59:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-29 20:59:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 20:59:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 20:59:58,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-11-29 20:59:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:59:58,588 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 20:59:58,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:59:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 20:59:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:59:58,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:58,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:59:58,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 20:59:58,792 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:59:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:59:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-11-29 20:59:58,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:59:58,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214793537] [2020-11-29 20:59:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:59:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:59:58,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214793537] [2020-11-29 20:59:58,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590899989] [2020-11-29 20:59:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:59:59,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 20:59:59,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:59:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:59:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:59:59,195 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-11-29 20:59:59,196 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-11-29 20:59:59,199 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:59:59,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:59:59,215 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:59:59,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-11-29 20:59:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:59:59,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:59:59,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-11-29 20:59:59,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029559703] [2020-11-29 20:59:59,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:59:59,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:59:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:59:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:59:59,247 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-11-29 20:59:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:59:59,356 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-29 20:59:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:59:59,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 20:59:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:59:59,359 INFO L225 Difference]: With dead ends: 23 [2020-11-29 20:59:59,359 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 20:59:59,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:59:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 20:59:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 20:59:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 20:59:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 20:59:59,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-11-29 20:59:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:59:59,364 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 20:59:59,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:59:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 20:59:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 20:59:59,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:59,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:59:59,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:59:59,573 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:59:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:59:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1859304665, now seen corresponding path program 1 times [2020-11-29 20:59:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:59:59,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746105983] [2020-11-29 20:59:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:59:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:59:59,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746105983] [2020-11-29 20:59:59,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046654911] [2020-11-29 20:59:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:59:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:59:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:59:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:59:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:59:59,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:59:59,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 20:59:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176077589] [2020-11-29 20:59:59,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:59:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:59:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:59:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:59:59,826 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-11-29 20:59:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:59:59,962 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-29 20:59:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:59:59,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-29 20:59:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:59:59,965 INFO L225 Difference]: With dead ends: 32 [2020-11-29 20:59:59,965 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 20:59:59,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:59:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 20:59:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-29 20:59:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 20:59:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 20:59:59,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-11-29 20:59:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:59:59,969 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 20:59:59,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:59:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 20:59:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:59:59,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:59:59,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:00,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:00,171 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 291228695, now seen corresponding path program 2 times [2020-11-29 21:00:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9530961] [2020-11-29 21:00:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:00:00,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9530961] [2020-11-29 21:00:00,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355532459] [2020-11-29 21:00:00,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:00,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:00:00,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:00:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:00:00,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:00,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 21:00:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552367110] [2020-11-29 21:00:00,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:00:00,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:00:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:00:00,438 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-11-29 21:00:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:00,492 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-29 21:00:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:00:00,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-29 21:00:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:00,494 INFO L225 Difference]: With dead ends: 34 [2020-11-29 21:00:00,494 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 21:00:00,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:00:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 21:00:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-29 21:00:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 21:00:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-29 21:00:00,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-11-29 21:00:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:00,499 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-29 21:00:00,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:00:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-29 21:00:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 21:00:00,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:00,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:00,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:00,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 3 times [2020-11-29 21:00:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:00,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648200763] [2020-11-29 21:00:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:00:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648200763] [2020-11-29 21:00:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105273323] [2020-11-29 21:00:00,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:00,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 21:00:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:00:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:01,042 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-11-29 21:00:01,043 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-11-29 21:00:01,045 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:01,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:01,051 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:01,051 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-11-29 21:00:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 21:00:01,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:01,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-29 21:00:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219823322] [2020-11-29 21:00:01,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 21:00:01,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 21:00:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:00:01,078 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-11-29 21:00:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:01,265 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-29 21:00:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:00:01,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-11-29 21:00:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:01,269 INFO L225 Difference]: With dead ends: 38 [2020-11-29 21:00:01,269 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 21:00:01,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:00:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 21:00:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-29 21:00:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 21:00:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-29 21:00:01,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-11-29 21:00:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:01,276 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-29 21:00:01,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 21:00:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-29 21:00:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 21:00:01,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:01,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:01,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 21:00:01,498 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1251069224, now seen corresponding path program 4 times [2020-11-29 21:00:01,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:01,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628967006] [2020-11-29 21:00:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 21:00:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628967006] [2020-11-29 21:00:01,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238486927] [2020-11-29 21:00:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:01,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:00:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:01,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 21:00:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:01,847 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-11-29 21:00:01,848 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-11-29 21:00:01,849 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:01,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:01,855 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:01,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-11-29 21:00:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 21:00:01,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:01,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-29 21:00:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225478718] [2020-11-29 21:00:01,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 21:00:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 21:00:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:00:01,883 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-11-29 21:00:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:02,106 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-11-29 21:00:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 21:00:02,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-11-29 21:00:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:02,108 INFO L225 Difference]: With dead ends: 44 [2020-11-29 21:00:02,108 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 21:00:02,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-29 21:00:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 21:00:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-29 21:00:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 21:00:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 21:00:02,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-11-29 21:00:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:02,113 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 21:00:02,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 21:00:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 21:00:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 21:00:02,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:02,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:02,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:02,338 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1378869733, now seen corresponding path program 5 times [2020-11-29 21:00:02,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:02,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302559544] [2020-11-29 21:00:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 21:00:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302559544] [2020-11-29 21:00:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712332160] [2020-11-29 21:00:02,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:04,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 21:00:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:00:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 21:00:04,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:04,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 21:00:04,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721070990] [2020-11-29 21:00:04,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 21:00:04,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 21:00:04,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:00:04,206 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-11-29 21:00:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:04,262 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-29 21:00:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:00:04,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-29 21:00:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:04,265 INFO L225 Difference]: With dead ends: 48 [2020-11-29 21:00:04,265 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 21:00:04,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:00:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 21:00:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-29 21:00:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 21:00:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-29 21:00:04,270 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-11-29 21:00:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:04,270 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-29 21:00:04,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 21:00:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-29 21:00:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 21:00:04,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:04,272 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:04,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:04,472 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1005994073, now seen corresponding path program 6 times [2020-11-29 21:00:04,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:04,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233702775] [2020-11-29 21:00:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 21:00:04,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233702775] [2020-11-29 21:00:04,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978801666] [2020-11-29 21:00:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:06,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 21:00:06,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:00:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:06,360 INFO L350 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-11-29 21:00:06,360 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-11-29 21:00:06,361 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:06,364 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:06,364 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:06,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-11-29 21:00:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 21:00:06,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:06,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-11-29 21:00:06,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731143992] [2020-11-29 21:00:06,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 21:00:06,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 21:00:06,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-29 21:00:06,407 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-11-29 21:00:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:06,748 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-11-29 21:00:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 21:00:06,749 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-11-29 21:00:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:06,752 INFO L225 Difference]: With dead ends: 52 [2020-11-29 21:00:06,752 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 21:00:06,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-11-29 21:00:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 21:00:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-29 21:00:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 21:00:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 21:00:06,757 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-11-29 21:00:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:06,757 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 21:00:06,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 21:00:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 21:00:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 21:00:06,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:06,759 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:06,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 21:00:06,959 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1595148508, now seen corresponding path program 7 times [2020-11-29 21:00:06,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670818888] [2020-11-29 21:00:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 21:00:07,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670818888] [2020-11-29 21:00:07,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371772963] [2020-11-29 21:00:07,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:00:07,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 21:00:07,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:07,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 21:00:07,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571248000] [2020-11-29 21:00:07,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 21:00:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 21:00:07,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:00:07,274 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-11-29 21:00:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:07,338 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-11-29 21:00:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:00:07,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-11-29 21:00:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:07,343 INFO L225 Difference]: With dead ends: 56 [2020-11-29 21:00:07,343 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 21:00:07,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:00:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 21:00:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-29 21:00:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 21:00:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-29 21:00:07,349 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-11-29 21:00:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:07,349 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-29 21:00:07,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 21:00:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-29 21:00:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 21:00:07,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:07,351 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:07,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:07,574 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1671756646, now seen corresponding path program 8 times [2020-11-29 21:00:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:07,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703872390] [2020-11-29 21:00:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 21:00:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703872390] [2020-11-29 21:00:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274598402] [2020-11-29 21:00:07,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:07,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:00:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:00:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 21:00:07,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:07,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 21:00:07,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287819922] [2020-11-29 21:00:07,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 21:00:07,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:00:07,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 21:00:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:00:07,895 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-11-29 21:00:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:07,995 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-11-29 21:00:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:00:07,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-29 21:00:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:07,996 INFO L225 Difference]: With dead ends: 57 [2020-11-29 21:00:07,996 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 21:00:07,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:00:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 21:00:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 21:00:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 21:00:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-11-29 21:00:08,001 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-11-29 21:00:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:08,001 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-11-29 21:00:08,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 21:00:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-11-29 21:00:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 21:00:08,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:08,003 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:08,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:00:08,214 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 9 times [2020-11-29 21:00:08,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:00:08,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144713646] [2020-11-29 21:00:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:00:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:08,730 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 23: A-local: [(|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,731 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 24: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,731 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 25: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,732 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 26: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,732 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 27: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,733 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 28: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,733 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 29: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,733 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 30: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,734 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 31: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,734 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 32: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,735 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 33: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,735 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 34: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-11-29 21:00:08,736 ERROR L253 erpolLogProxyWrapper]: Interpolant 35 not inductive [2020-11-29 21:00:08,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 21:00:08,737 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-29 21:00:08,742 INFO L168 Benchmark]: Toolchain (without parser) took 11969.67 ms. Allocated memory was 86.0 MB in the beginning and 144.7 MB in the end (delta: 58.7 MB). Free memory was 55.6 MB in the beginning and 87.6 MB in the end (delta: -32.0 MB). Peak memory consumption was 78.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:08,742 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 44.7 MB in the beginning and 44.6 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:00:08,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.18 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 55.5 MB in the beginning and 94.4 MB in the end (delta: -38.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:08,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.10 ms. Allocated memory is still 117.4 MB. Free memory was 94.4 MB in the beginning and 92.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:08,743 INFO L168 Benchmark]: Boogie Preprocessor took 50.93 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:00:08,744 INFO L168 Benchmark]: RCFGBuilder took 538.96 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 75.5 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:08,744 INFO L168 Benchmark]: TraceAbstraction took 10974.09 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 75.1 MB in the beginning and 87.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 68.8 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:08,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 44.7 MB in the beginning and 44.6 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.18 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 55.5 MB in the beginning and 94.4 MB in the end (delta: -38.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.10 ms. Allocated memory is still 117.4 MB. Free memory was 94.4 MB in the beginning and 92.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.93 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 538.96 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 75.5 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10974.09 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 75.1 MB in the beginning and 87.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 68.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:00:11,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:00:11,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:00:11,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:00:11,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:00:11,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:00:11,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:00:11,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:00:11,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:00:11,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:00:11,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:00:11,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:00:11,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:00:11,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:00:11,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:00:11,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:00:11,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:00:11,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:00:11,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:00:11,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:00:11,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:00:11,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:00:11,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:00:11,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:00:11,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:00:11,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:00:11,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:00:11,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:00:11,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:00:11,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:00:11,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:00:11,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:00:11,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:00:11,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:00:11,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:00:11,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:00:11,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:00:11,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:00:11,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:00:11,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:00:11,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:00:11,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 21:00:11,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:00:11,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:00:11,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:00:11,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:00:11,432 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:00:11,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:00:11,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:00:11,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:00:11,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:00:11,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:00:11,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:00:11,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:00:11,435 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 21:00:11,435 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 21:00:11,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:00:11,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:00:11,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:00:11,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:00:11,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:00:11,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:00:11,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:00:11,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:00:11,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:00:11,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:00:11,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:00:11,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:00:11,438 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 21:00:11,439 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 21:00:11,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:00:11,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:00:11,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 21:00:11,439 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-11-29 21:00:11,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:00:11,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:00:11,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:00:11,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:00:11,874 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:00:11,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test25-1.c [2020-11-29 21:00:11,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/44b356ab3/3cb0a76b61964c009c44d90909e6556a/FLAG79b6f78e3 [2020-11-29 21:00:12,533 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:00:12,534 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/sv-benchmarks/c/ldv-regression/test25-1.c [2020-11-29 21:00:12,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/44b356ab3/3cb0a76b61964c009c44d90909e6556a/FLAG79b6f78e3 [2020-11-29 21:00:12,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/data/44b356ab3/3cb0a76b61964c009c44d90909e6556a [2020-11-29 21:00:12,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:00:12,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:00:12,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:00:12,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:00:12,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:00:12,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:00:12" (1/1) ... [2020-11-29 21:00:12,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5d5ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:12, skipping insertion in model container [2020-11-29 21:00:12,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:00:12" (1/1) ... [2020-11-29 21:00:12,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:00:12,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:00:13,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:00:13,174 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:00:13,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:00:13,226 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:00:13,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13 WrapperNode [2020-11-29 21:00:13,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:00:13,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:00:13,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:00:13,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:00:13,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:00:13,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:00:13,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:00:13,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:00:13,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... [2020-11-29 21:00:13,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:00:13,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:00:13,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:00:13,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:00:13,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:00:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 21:00:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 21:00:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 21:00:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:00:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 21:00:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:00:13,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:00:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:00:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-29 21:00:13,976 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:00:13,976 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 21:00:13,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:00:13 BoogieIcfgContainer [2020-11-29 21:00:13,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:00:13,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:00:13,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:00:13,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:00:13,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:00:12" (1/3) ... [2020-11-29 21:00:13,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e00e000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:00:13, skipping insertion in model container [2020-11-29 21:00:13,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:00:13" (2/3) ... [2020-11-29 21:00:13,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e00e000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:00:13, skipping insertion in model container [2020-11-29 21:00:13,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:00:13" (3/3) ... [2020-11-29 21:00:13,986 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-11-29 21:00:13,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:00:14,001 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:00:14,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:00:14,056 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:00:14,056 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:00:14,056 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:00:14,056 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:00:14,057 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:00:14,057 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:00:14,057 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:00:14,057 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:00:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-29 21:00:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:00:14,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:14,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:14,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-11-29 21:00:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:14,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084650407] [2020-11-29 21:00:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:14,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 21:00:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:14,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:14,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084650407] [2020-11-29 21:00:14,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:00:14,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 21:00:14,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658759636] [2020-11-29 21:00:14,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:00:14,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:14,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:00:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:00:14,294 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-11-29 21:00:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:14,311 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-11-29 21:00:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:00:14,313 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 21:00:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:14,322 INFO L225 Difference]: With dead ends: 31 [2020-11-29 21:00:14,323 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 21:00:14,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:00:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 21:00:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 21:00:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 21:00:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 21:00:14,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-29 21:00:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:14,357 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 21:00:14,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:00:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-29 21:00:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:00:14,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:14,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:14,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 21:00:14,578 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-11-29 21:00:14,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:14,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441909685] [2020-11-29 21:00:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 21:00:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:14,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441909685] [2020-11-29 21:00:14,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:00:14,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 21:00:14,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441382749] [2020-11-29 21:00:14,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:00:14,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:00:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:00:14,734 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-11-29 21:00:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:14,802 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-11-29 21:00:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:00:14,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 21:00:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:14,805 INFO L225 Difference]: With dead ends: 25 [2020-11-29 21:00:14,805 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 21:00:14,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:00:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 21:00:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-29 21:00:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 21:00:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 21:00:14,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-11-29 21:00:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:14,812 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 21:00:14,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:00:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 21:00:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 21:00:14,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:14,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:15,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 21:00:15,036 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 1 times [2020-11-29 21:00:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:15,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787622521] [2020-11-29 21:00:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 21:00:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:00:15,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787622521] [2020-11-29 21:00:15,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:15,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-29 21:00:15,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973151058] [2020-11-29 21:00:15,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:00:15,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:00:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:00:15,243 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2020-11-29 21:00:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:15,609 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-29 21:00:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:00:15,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-29 21:00:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:15,613 INFO L225 Difference]: With dead ends: 33 [2020-11-29 21:00:15,613 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 21:00:15,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:00:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 21:00:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 21:00:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 21:00:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 21:00:15,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-11-29 21:00:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:15,619 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 21:00:15,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:00:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 21:00:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 21:00:15,620 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:15,621 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:15,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 21:00:15,821 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 2 times [2020-11-29 21:00:15,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:15,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555812900] [2020-11-29 21:00:15,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:15,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 21:00:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 21:00:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:16,167 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2020-11-29 21:00:16,169 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:16,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:16,217 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:16,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:9 [2020-11-29 21:00:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 21:00:16,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:16,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 10 [2020-11-29 21:00:16,479 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:16,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:16,481 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:16,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:1 [2020-11-29 21:00:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 21:00:16,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555812900] [2020-11-29 21:00:16,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:00:16,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2020-11-29 21:00:16,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821786521] [2020-11-29 21:00:16,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:00:16,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:00:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:00:16,486 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-11-29 21:00:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:17,066 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-29 21:00:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:00:17,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-11-29 21:00:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:17,070 INFO L225 Difference]: With dead ends: 33 [2020-11-29 21:00:17,070 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 21:00:17,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:00:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 21:00:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 21:00:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 21:00:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 21:00:17,079 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-11-29 21:00:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:17,079 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 21:00:17,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:00:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 21:00:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 21:00:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:17,081 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:17,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 21:00:17,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1442110442, now seen corresponding path program 1 times [2020-11-29 21:00:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38513920] [2020-11-29 21:00:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:00:17,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:00:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 21:00:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 21:00:17,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38513920] [2020-11-29 21:00:17,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:17,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-11-29 21:00:17,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687568542] [2020-11-29 21:00:17,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 21:00:17,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 21:00:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-11-29 21:00:17,767 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 16 states. [2020-11-29 21:00:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:18,827 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-11-29 21:00:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:00:18,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-11-29 21:00:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:18,840 INFO L225 Difference]: With dead ends: 49 [2020-11-29 21:00:18,840 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 21:00:18,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:00:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 21:00:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 21:00:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 21:00:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 21:00:18,848 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 27 [2020-11-29 21:00:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:18,848 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 21:00:18,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 21:00:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 21:00:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 21:00:18,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:18,850 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:19,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 21:00:19,063 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash 70008334, now seen corresponding path program 2 times [2020-11-29 21:00:19,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:19,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785617109] [2020-11-29 21:00:19,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:19,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:00:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 21:00:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:19,644 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2020-11-29 21:00:19,645 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:19,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:19,683 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:19,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:9 [2020-11-29 21:00:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 21:00:19,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:20,489 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 16 [2020-11-29 21:00:20,499 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:20,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:20,500 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:20,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:1 [2020-11-29 21:00:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 21:00:20,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785617109] [2020-11-29 21:00:20,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:20,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-11-29 21:00:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199787210] [2020-11-29 21:00:20,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 21:00:20,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 21:00:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:00:20,507 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-11-29 21:00:22,963 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-11-29 21:00:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:23,981 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-11-29 21:00:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 21:00:23,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-11-29 21:00:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:23,984 INFO L225 Difference]: With dead ends: 49 [2020-11-29 21:00:23,984 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 21:00:23,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-11-29 21:00:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 21:00:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-29 21:00:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 21:00:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-29 21:00:23,996 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2020-11-29 21:00:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:23,997 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-29 21:00:23,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 21:00:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-29 21:00:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 21:00:23,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:23,999 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:24,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 21:00:24,216 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 312565410, now seen corresponding path program 3 times [2020-11-29 21:00:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:24,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522439067] [2020-11-29 21:00:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:24,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 21:00:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:00:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 21:00:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:00:25,241 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2020-11-29 21:00:25,242 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:25,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:25,271 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:25,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:9 [2020-11-29 21:00:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 21:00:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:00:28,039 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 16 [2020-11-29 21:00:28,066 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:00:28,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:00:28,067 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:00:28,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:1 [2020-11-29 21:00:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 21:00:28,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522439067] [2020-11-29 21:00:28,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:00:28,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-11-29 21:00:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143524968] [2020-11-29 21:00:28,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 21:00:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:00:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 21:00:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-11-29 21:00:28,076 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 23 states. [2020-11-29 21:00:33,534 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-11-29 21:00:35,999 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-11-29 21:00:38,144 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-11-29 21:00:40,264 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-11-29 21:00:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:00:51,785 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-11-29 21:00:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 21:00:51,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-11-29 21:00:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:00:51,788 INFO L225 Difference]: With dead ends: 70 [2020-11-29 21:00:51,788 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 21:00:51,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 21:00:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 21:00:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-11-29 21:00:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 21:00:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-11-29 21:00:51,816 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2020-11-29 21:00:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:00:51,817 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-11-29 21:00:51,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 21:00:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-11-29 21:00:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 21:00:51,818 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:00:51,818 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:00:52,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 21:00:52,034 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:00:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:00:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash 562473782, now seen corresponding path program 4 times [2020-11-29 21:00:52,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:00:52,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935023385] [2020-11-29 21:00:52,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-29 21:00:52,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:00:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 21:00:52,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:00:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:00:52,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:00:52,907 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 21:00:52,908 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:00:53,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 21:00:53,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:00:53 BoogieIcfgContainer [2020-11-29 21:00:53,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:00:53,183 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:00:53,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:00:53,184 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:00:53,184 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:00:13" (3/4) ... [2020-11-29 21:00:53,186 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:00:53,281 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c3aa9dd3-39c2-4ac6-910e-f7ca747b8e74/bin/uautomizer/witness.graphml [2020-11-29 21:00:53,281 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:00:53,282 INFO L168 Benchmark]: Toolchain (without parser) took 40358.30 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 40.3 MB in the beginning and 22.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,283 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 43.7 MB in the end (delta: 38.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:00:53,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.14 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 29.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.86 ms. Allocated memory is still 60.8 MB. Free memory was 29.6 MB in the beginning and 28.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,284 INFO L168 Benchmark]: Boogie Preprocessor took 29.53 ms. Allocated memory is still 60.8 MB. Free memory was 28.0 MB in the beginning and 26.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:00:53,284 INFO L168 Benchmark]: RCFGBuilder took 656.08 ms. Allocated memory is still 60.8 MB. Free memory was 26.5 MB in the beginning and 29.8 MB in the end (delta: -3.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,285 INFO L168 Benchmark]: TraceAbstraction took 39203.97 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 29.4 MB in the beginning and 27.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,285 INFO L168 Benchmark]: Witness Printer took 97.88 ms. Allocated memory is still 77.6 MB. Free memory was 27.6 MB in the beginning and 22.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:00:53,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 43.7 MB in the end (delta: 38.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.14 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 29.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.86 ms. Allocated memory is still 60.8 MB. Free memory was 29.6 MB in the beginning and 28.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.53 ms. Allocated memory is still 60.8 MB. Free memory was 28.0 MB in the beginning and 26.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 656.08 ms. Allocated memory is still 60.8 MB. Free memory was 26.5 MB in the beginning and 29.8 MB in the end (delta: -3.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39203.97 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 29.4 MB in the beginning and 27.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * Witness Printer took 97.88 ms. Allocated memory is still 77.6 MB. Free memory was 27.6 MB in the beginning and 22.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L3] __assert_fail("0", "test25-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.0s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 29.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 119 SDslu, 246 SDs, 0 SdLazy, 522 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 362 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 29.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 215 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 314 ConstructedInterpolants, 20 QuantifiedInterpolants, 63904 SizeOfPredicates, 55 NumberOfNonLiveVariables, 603 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 484/660 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...